Welcome to our blog post "C++ Array Quiz - MCQ Questions and Answers," a tailored challenge for anyone looking to test and enhance their understanding of arrays in C++. Perfect for students, programming enthusiasts, and seasoned developers alike, this quiz covers a range of topics from the basics of array initialization to more complex operations and concepts.
Each question is designed not only to test your knowledge but also to provide insightful explanations that aid in learning and retention. Whether you're preparing for an exam, a job interview, or just looking to refresh your C++ skills, these carefully curated multiple-choice questions are here to guide your learning journey. So, ready your minds, and let's dive into the world of C++ arrays!
1. How is an array declared in C++?
a) dataType arrayName[size];
b) array dataType[size];
c) dataType[size] arrayName;
d) arrayName[size] dataType;
2. What is the default value of elements in an uninitialized array in C++?
a) Null
b) 0
c) Garbage values
d) It depends on the compiler
3. How do you access the third element in an array named 'data' in C++?
a) data[2]
b) data[3]
c) data(2)
d) data(3)
4. Which of the following array declarations is correct in C++?
a) int numbers[5] = {1, 2, 3, 4, 5};
b) float rates[] = {2.5, 3.0, 4.5, 5.5};
c) char name[10] = "John";
d) All of the above
5. Can the size of an array be changed at runtime in C++?
a) Yes, always
b) No, never
c) Only for dynamic arrays
d) Only if it is a global array
6. What is a multidimensional array in C++?
a) An array with elements of different types
b) An array with functions as elements
c) An array of arrays
d) An array with more than 100 elements
7. How do you initialize a two-dimensional array in C++?
a) Using nested loops
b) Using multiple one-dimensional arrays
c) Using a single initializer list with commas
d) Using nested initializer lists
8. What does array decay refer to in C++?
a) Conversion of an array into a single value
b) Loss of array type information and conversion to a pointer
c) Physical degradation of an array over time
d) Decrease in array size at runtime
9. What is the output of the following C++ code?
int arr[3] = {0};
printf("%d %d %d", arr[0], arr[1], arr[2]);
a) 0 0 0
b) Garbage values
c) Error
d) 0 followed by garbage values
10. Which of the following statements about arrays in C++ is correct?
a) Arrays can store elements of different data types
b) Array indices start at 1
c) The size of an array must be a constant expression
d) Elements in an array are accessed using parentheses
11. What is a pointer to an array in C++?
a) A variable that points to the first element of an array
b) A special type of array
c) A function that returns an array
d) An array of pointers
12. How do you pass an array to a function in C++?
a) By specifying the array elements individually
b) By passing the array name
c) By passing the first element of the array
d) By creating a copy of the array
13. Can an array contain a pointer in C++?
a) Yes
b) No
c) Only in special cases
d) Only if it is a void pointer
14. What is the relationship between arrays and pointers in C++?
a) They are completely unrelated
b) They are the same thing
c) Arrays can be treated as pointers
d) Pointers can only point to single values, not arrays
15. What is the output of the following C++ code?
int arr[] = {1, 2, 3};
printf("%d", *(arr + 1));
a) 1
b) 2
c) 3
d) Error
16. How can you dynamically allocate an array in C++?
a) Using the malloc() function
b) Using the new operator
c) By declaring the array with a variable size
d) Using the create() function
17. What is the correct way to deallocate a dynamically allocated array in C++?
a) delete[]
b) delete
c) free()
d) remove()
18. What is the purpose of a range-based for loop in C++?
a) To iterate over each element of an array
b) To execute a loop a specific number of times
c) To create an array with a specific range
d) To compare elements in an array
19. In C++, what is an array of arrays commonly known as?
a) Pointer array
b) Multidimensional array
c) Double array
d) Nested array
20. How do you initialize an array to zero in C++?
a) int arr[10] = {0};
b) int arr[10] = {};
c) int arr[10]();
d) Both a) and b)
Comments
Post a Comment
Leave Comment